Among active lupus nephritis patients (Figure 4B), urine VCAM-1 (r 0.57, P<0.0001), ALCAM (r 0.53, P<0.0001) and PF4 (r 0.50, P<0.0001) exhibited the best correlations with renal SLEDAI. The gene discussed is ALCAM; the disease is lupus nephritis.